Female mosquitoes spread diseases when they bite humans to obtain blood. it is only
the females that do the biting. research is being conducted to alter the dna of male
mosquitoes. these altered males could then mate with normal female mosquitoes. all of
the resulting female offspring would have wing defects that prevent them from flying.
-- one assumption from this research is that the
(1) altered males would begin to bite humans and spread the diseases
(2) female offspring would be unable to bite humans, since they cannot fly
(3) altered males would not be able to reproduce
(4) female offspring would become larger in size
-- the method used to alter the male mosquitoes is an example of an application of
(1) a feedback mechanism (3) biotechnology
(2) selective breeding (4) physiology
i think it's called an electron microscope.
the answer would be: dominantexplanation
a cross between a true breeding short plant (homozygous for short, suppose tt), and a cross between a true breeding tall plant (homozygous for tallness, suppose tt) would result in all the offspring being heterozygous for the traits, meaning they would each have an allele of shortness (t) and an allele of tallness (t).
considering the offspring were all tall, we understand that the allele for tallness must have been dominant over the allele for shortness to present itself over it. hence, the term describing the gene for tallness would be dominant, and the term describing the gene for shortness would be recessive.
hope this !
the correct answer would be nondisjunction.
nondisjunction refers to the failure or improper division of chromosomes during a cell division.
it can occur in meiosis i, meiosis ii as well as in mitosis.
in anaphase i of meiosis i nondisjunction results in improper segregation of homologous chromosomes due to which one cell gets two copies of the chromosome and other cell does not get a single copy of that chromosome.
similarly, in anaphase ii, the sister chromatids are improperly divided due to nondisjunction. it results in a situation in which one daughter cell posses an extra copy of the chromosome while the daughter cell lacks that chromosome.
for example, in down syndrome trisomy of chromosome 21 occurs due to nondisjunction.
sand on the ocean floor is abiotic because it isn't alive.